Lubricant preparation



Patented Dec. 10, 1940 UNITED STATES 2,224,368 LUBRICANT PREPARATION John M. Musselman and Herman P. Lankelma, Cleveland, Ohio, assignors to The Standard Oil Company, Cleveland, Ohio, a corporation of Ohio No Drawing. Application November 11, 1937, Serial No. 174,014

10 Claims. (Cl. 252-51) This invention relates to lubricants, and more particularly lubricants which may be brought into service under special drastic operating conditions; and to the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described, and particularly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various ways in which the principle of the invention may be employed.

We have found that if a lubricant be made up with certain compounds, the result is a remarkably durable product, which is all the more surprising in as much as the constituents do not indicate such result-possibility. A mineral oil is employed as a base, and with it in composition a small amount of an alkaloid salt of an organic 2b carboxylic acid of at least six carbon atoms, 1. e.,

a fatty acid of at least six carbon atoms, a naphthenic acid, or a halo-carboxylic acid (fatty acid or naphthenic), and alkaloids such as brucine, cinchonine, quinine and other quinine alkaloids being particularly desirable, although all the commercially available alkaloids forming these salts are applicable. Illustrative of such salts are brucine stearate,.brucine laurate, brucine palmitate, brucine oleate, cinchonine laurate, 30 cinchonine stearate, cinchonine oleate, cinchonine palmitate, quinine palmitate, quinine stearate, quinine laurate, quinine oleate, strychnine stearate, strychnine oleate, firychnine laurate, strychnine palmitate, brucine naphthenate, strychnine naphthenate, quinine naphthenate, cinchonine naphthenate, brucine chlorostearate, cinchonine chlorostearate, quinine chlorostearate, strychnine chlorostearate, cinchonine dichlorostearate, brucine dichlorostearate, quinine dichlorostearate, strychnine dichlorostearate, strychnine dichloropalmitate, brucine dichloropalmitate, cinchonine dichloropalmitate, quinine dichloropalmitate, etc. The salts are prepared by heating together molar equivalents of alkaloid and acid at around 212 F., with or without a solvent such as esters of higher 45 fatty acids.

Very small amounts of the saltare sufiicient. The amount employed for the lubricant need not generally exceed one per cent, based on the oil, and may usually be one-tenth to one per cent.

As an example: A Mid-Continent S. A. E. 30 oil is compounded with.0.1 per cent of brucine dichlorostearate. This product when operated as an internal combustion engine lubricant under severe engine operating conditions,. viz., head temperature 500 F., and jacket temperature cent sludge.

212 F., after 18 hours of continuous operation showed only 0.02 per cent sludge, whereas oil and similarly compounded dichlorostearic acid per se showed 0.08- per cent sludge, and the oil alone showed 0.06 per cent sludge. After 45 hours continuous running, the brucine dichlorostearate oil combination showed 0.30 per cent sludge, while the dichlorostearic acid and oil combination showed 1.00 per cent sludge and the oil under corresponding condition alone showed 0.80 per In the last two instances rings in the engine stuck, but there was no ring sticking with the brucine dichlorostearate oil combination, and the engine continued to be highly satisfactorily lubricated.

Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims, or the equivalent of such, be employed.

We therefore particularly point out and distinctly claim as our invention:

1. A lubricant comprising a mineral lubricating oil .".nd a small amount of an alkaloid salt of .an organic carboxylic acid of at least six carbon atoms.

2. A lubricant comprising a mineral lubricating oil and a small amount of an alkaloid salt of a fatty acid of at least six carbon atoms.

3. A lubricant comprising a mineral lubricating oil and a small amount of an alkaloid naphthenate.

4. A lubricant comprising a mineral lubricating oil and a small amount of an alkaloid salt of an organic halocarboxylic acid of at least six carbon atoms.

5. A lubricant comprising a mineral lubricating oil and a small amount of a brucine salt of an organic carboxylic acid of at least six carbon atoms.

6. A lubricant comprising a mineral lubricating oil and a small amount of a brucine salt of a fatty acid of at least six carbon atoms.

7. A lubricant comprising a mineral lubricating oil and a small amount of a brucine salt ofan organic halocarboxylic acid of at least six carbon atoms.

8. A lubricant comprising a mineral lubricating oil and a small amount of brucine naphthenate.

9. A lubricant comprising a mineral lubricating oil and a small amount of brucine stearate.

10. A lubricant comprising a mineral lubricating oil and a small amount oi. brucine dichlorostearate.

JOHN M. MUSSEIMAN. HERMAN P. LANKELMA. 

